La Crosse Technology 53147130 Manual De Instrucciones página 26

Note: Once the weather tendency indicator has registered a change in air pressure, it will remain permanently
visualized on the LCD.
AIR PRESSURE HISTORY (ELECTRONIC BAROMETER WITH BAROMETRIC PRESSURE TREND)
The right side of the second section of the LCD shows the air pressure history bar graph.
The bar graph indicates the air pressure history trend over the last 12 hours in 5 intervals: 0h, -3h, -6h, -9h and -
12h. The "0h" represents the current full hour air pressure recording. The columns represent the "hPa" (0, ±1, ±3,
±5) at specific time. The "0" in the middle of this scale is equal to the current pressure and each change (±1, ±3,
±5) represents how high or low in "hPa" the past pressure was compared to the current pressure.
If the bars are rising it means that the weather is getting better due to the increase of air pressure. If the bars go
down, it means the air pressure has dropped and the weather is expected to get worse from the present time
"0h".
Note:
For accurate barometric pressure trends, the weather station should operate at the same altitude for recordings
(i.e. it should not be moved from the ground to the second floor of the house). When the unit is moved to a new
location, discard readings for the next 12 hours.
ABSOLUTE/RELATIVE AIR PRESSURE
Press the SET key to toggle between relative and absolute air pressure displays.
Note:
Absolute air pressure provides the display of the true measured air pressure of the current time and location. This
is not programmable and the absolute air pressure range of the weather station is from 300 hPa to 1099 hPa
(standard air pressure at an altitude of 9,100 meters is around 300 hPa).
Relative air pressure is the one value that is calculated back to sea level from the local absolute air pressure and
can thus be taken as a reference for weather condition and weather development for the entire country. It can be
programmed to represent your local surroundings. Since the relative air pressure is also the one value given by
various newspapers, TV and radio broadcasting stations in their daily weather forecasts for their respective
locations, users can set the relative air pressure of the weather station to this value to represent readings in your
area (see "Relative Air Pressure Reference Value Setting").
Air pressure trend over
the last 12 hours
Absolute air pressure display
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